2-7b-5b=20

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Solution for 2-7b-5b=20 equation: 



2-7b-5b=20

We move all terms to the left:

2-7b-5b-(20)=0

We add all the numbers together, and all the variables

-12b-18=0

We move all terms containing b to the left, all other terms to the right

-12b=18

b=18/-12

b=-1+1/2

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